2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2012-07-25 18:12:14 +03:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2009-12-17 14:25:01 +01:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2008-07-26 03:46:43 -04:00
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 17:04:11 +09:00
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2008-07-14 19:08:37 +03:00
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2008-12-28 11:34:26 +02:00
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2008-07-14 19:08:37 +03:00
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2012-05-16 19:15:56 +03:00
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2008-07-14 19:08:37 +03:00
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2008-09-05 16:17:42 +03:00
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2008-07-14 19:08:37 +03:00
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2011-03-29 18:04:05 +03:00
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2008-07-14 19:08:37 +03:00
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fs: symlink write_begin allocation context fix
With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened. They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim. This bug could
cause filesystem deadlocks.
The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called. It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock. The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.
Add a new flag for write_begin, AOP_FLAG_NOFS. Filesystems can now act on
this flag in their write_begin function. Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).
This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg. ocfs2_alloc_write_ctxt, for a
random example).
[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org> [2.6.28.x]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Cleaned up the calling convention: just pass in the AOP flags
untouched to the grab_cache_page_write_begin() function. That
just simplifies everybody, and may even allow future expansion of the
logic. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04 12:00:53 -08:00
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2008-07-14 19:08:37 +03:00
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fs: symlink write_begin allocation context fix
With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened. They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim. This bug could
cause filesystem deadlocks.
The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called. It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock. The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.
Add a new flag for write_begin, AOP_FLAG_NOFS. Filesystems can now act on
this flag in their write_begin function. Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).
This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg. ocfs2_alloc_write_ctxt, for a
random example).
[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org> [2.6.28.x]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Cleaned up the calling convention: just pass in the AOP flags
untouched to the grab_cache_page_write_begin() function. That
just simplifies everybody, and may even allow future expansion of the
logic. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04 12:00:53 -08:00
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2008-07-14 19:08:37 +03:00
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2008-12-09 11:02:51 -05:00
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2008-07-14 19:08:37 +03:00
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2009-02-23 12:47:25 +02:00
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2008-07-14 19:08:37 +03:00
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2010-09-19 18:34:26 +03:00
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2008-07-14 19:08:37 +03:00
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UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 16:44:28 +03:00
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2008-07-14 19:08:37 +03:00
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fs: symlink write_begin allocation context fix
With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened. They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim. This bug could
cause filesystem deadlocks.
The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called. It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock. The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.
Add a new flag for write_begin, AOP_FLAG_NOFS. Filesystems can now act on
this flag in their write_begin function. Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).
This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg. ocfs2_alloc_write_ctxt, for a
random example).
[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org> [2.6.28.x]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Cleaned up the calling convention: just pass in the AOP flags
untouched to the grab_cache_page_write_begin() function. That
just simplifies everybody, and may even allow future expansion of the
logic. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04 12:00:53 -08:00
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2008-07-14 19:08:37 +03:00
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2009-02-23 12:47:25 +02:00
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2008-07-14 19:08:37 +03:00
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UBIFS: fix assertion warning and refine comments
This patch fixes the following UBIFS assertion warning:
UBIFS assert failed in do_readpage at 115 (pid 199)
[<b00321b8>] (unwind_backtrace+0x0/0xdc) from [<af025118>]
(do_readpage+0x108/0x594 [ubifs])
[<af025118>] (do_readpage+0x108/0x594 [ubifs]) from [<af025764>]
(ubifs_write_end+0x1c0/0x2e8 [ubifs])
[<af025764>] (ubifs_write_end+0x1c0/0x2e8 [ubifs]) from
[<b00a0164>] (generic_file_buffered_write+0x18c/0x270)
[<b00a0164>] (generic_file_buffered_write+0x18c/0x270) from
[<b00a08d4>] (__generic_file_aio_write+0x478/0x4c0)
[<b00a08d4>] (__generic_file_aio_write+0x478/0x4c0) from
[<b00a0984>] (generic_file_aio_write+0x68/0xc8)
[<b00a0984>] (generic_file_aio_write+0x68/0xc8) from
[<af024a78>] (ubifs_aio_write+0x178/0x1d8 [ubifs])
[<af024a78>] (ubifs_aio_write+0x178/0x1d8 [ubifs]) from
[<b00d104c>] (do_sync_write+0xb0/0x100)
[<b00d104c>] (do_sync_write+0xb0/0x100) from [<b00d1abc>]
(vfs_write+0xac/0x154)
[<b00d1abc>] (vfs_write+0xac/0x154) from [<b00d1c10>]
(sys_write+0x3c/0x68)
[<b00d1c10>] (sys_write+0x3c/0x68) from [<b002d9a0>]
(ret_fast_syscall+0x0/0x2c)
The 'PG_checked' flag is used to indicate that the page does not
supposedly exist on the media (e.g., a hole or a page beyond the
inode size), so it requires slightly bigger budget, because we have
to account the indexing size increase. And this flag basically
tells that the budget for this page has to be "new page budget".
The "new page budget" is slightly bigger than the "existing page
budget".
The 'do_readpage()' function has the following assertion which
sometimes is hit: 'ubifs_assert(!PageChecked(page))'. Obviously,
the meaning of this assertion is: "I should not be asked to read
a page which does not exist on the media".
However, in 'ubifs_write_begin()' we have a small "trick". Notice,
that VFS may write pages which were not read yet, so the page data
were not loaded from the media to the page cache yet. If VFS tells
that it is going to change only some part of the page, we obviously
have to load it from the media. However, if VFS tells that it is
going to change whole page, we do not read it from the media for
optimization purposes.
However, since we do not read it, we do not know if it exists on
the media or not (a hole, etc). So we set the 'PG_checked' flag
to this page to force bigger budget, just in case.
So 'ubifs_write_begin()' sets 'PG_checked'. Then we are in
'ubifs_write_end()'. And VFS tells us: "hey, for some reasons I
changed my mind and did not change whole page". Frankly, I do not
know why this happens, but I hit this somehow on an ARM platform.
And this is extremely rare.
So in this case UBIFS does the following:
1. Cancels allocated budget.
2. Loads the page from the media by calling 'do_readpage()'.
3. Asks VFS to repeat the whole write operation from the very
beginning (call '->write_begin() again, etc).
And the assertion warning is hit at the step 2 - remember we have
the 'PG_checked' set for this page, and 'do_readpage()' does not
like this. So this patch fixes the problem by adding step 1.5 and
cleaning the 'PG_checked' before calling 'do_readpage()'.
All in all, this patch does not fix any functionality issue, but it
silences UBIFS false positive warning which may happen in very very
rare cases.
And while on it, this patch also improves a commentary which explains
the reasons of setting the 'PG_checked' flag for the page. The old
commentary was a bit difficult to understand.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-03-23 10:32:58 +02:00
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2008-07-14 19:08:37 +03:00
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2009-02-23 12:47:25 +02:00
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2008-07-14 19:08:37 +03:00
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2009-02-23 12:47:25 +02:00
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2008-07-14 19:08:37 +03:00
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|
fs: symlink write_begin allocation context fix
With the write_begin/write_end aops, page_symlink was broken because it
could no longer pass a GFP_NOFS type mask into the point where the
allocations happened. They are done in write_begin, which would always
assume that the filesystem can be entered from reclaim. This bug could
cause filesystem deadlocks.
The funny thing with having a gfp_t mask there is that it doesn't really
allow the caller to arbitrarily tinker with the context in which it can be
called. It couldn't ever be GFP_ATOMIC, for example, because it needs to
take the page lock. The only thing any callers care about is __GFP_FS
anyway, so turn that into a single flag.
Add a new flag for write_begin, AOP_FLAG_NOFS. Filesystems can now act on
this flag in their write_begin function. Change __grab_cache_page to
accept a nofs argument as well, to honour that flag (while we're there,
change the name to grab_cache_page_write_begin which is more instructive
and does away with random leading underscores).
This is really a more flexible way to go in the end anyway -- if a
filesystem happens to want any extra allocations aside from the pagecache
ones in ints write_begin function, it may now use GFP_KERNEL (rather than
GFP_NOFS) for common case allocations (eg. ocfs2_alloc_write_ctxt, for a
random example).
[kosaki.motohiro@jp.fujitsu.com: fix ubifs]
[kosaki.motohiro@jp.fujitsu.com: fix fuse]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: <stable@kernel.org> [2.6.28.x]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Cleaned up the calling convention: just pass in the AOP flags
untouched to the grab_cache_page_write_begin() function. That
just simplifies everybody, and may even allow future expansion of the
logic. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04 12:00:53 -08:00
|
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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UBIFS: fix assertion warning and refine comments
This patch fixes the following UBIFS assertion warning:
UBIFS assert failed in do_readpage at 115 (pid 199)
[<b00321b8>] (unwind_backtrace+0x0/0xdc) from [<af025118>]
(do_readpage+0x108/0x594 [ubifs])
[<af025118>] (do_readpage+0x108/0x594 [ubifs]) from [<af025764>]
(ubifs_write_end+0x1c0/0x2e8 [ubifs])
[<af025764>] (ubifs_write_end+0x1c0/0x2e8 [ubifs]) from
[<b00a0164>] (generic_file_buffered_write+0x18c/0x270)
[<b00a0164>] (generic_file_buffered_write+0x18c/0x270) from
[<b00a08d4>] (__generic_file_aio_write+0x478/0x4c0)
[<b00a08d4>] (__generic_file_aio_write+0x478/0x4c0) from
[<b00a0984>] (generic_file_aio_write+0x68/0xc8)
[<b00a0984>] (generic_file_aio_write+0x68/0xc8) from
[<af024a78>] (ubifs_aio_write+0x178/0x1d8 [ubifs])
[<af024a78>] (ubifs_aio_write+0x178/0x1d8 [ubifs]) from
[<b00d104c>] (do_sync_write+0xb0/0x100)
[<b00d104c>] (do_sync_write+0xb0/0x100) from [<b00d1abc>]
(vfs_write+0xac/0x154)
[<b00d1abc>] (vfs_write+0xac/0x154) from [<b00d1c10>]
(sys_write+0x3c/0x68)
[<b00d1c10>] (sys_write+0x3c/0x68) from [<b002d9a0>]
(ret_fast_syscall+0x0/0x2c)
The 'PG_checked' flag is used to indicate that the page does not
supposedly exist on the media (e.g., a hole or a page beyond the
inode size), so it requires slightly bigger budget, because we have
to account the indexing size increase. And this flag basically
tells that the budget for this page has to be "new page budget".
The "new page budget" is slightly bigger than the "existing page
budget".
The 'do_readpage()' function has the following assertion which
sometimes is hit: 'ubifs_assert(!PageChecked(page))'. Obviously,
the meaning of this assertion is: "I should not be asked to read
a page which does not exist on the media".
However, in 'ubifs_write_begin()' we have a small "trick". Notice,
that VFS may write pages which were not read yet, so the page data
were not loaded from the media to the page cache yet. If VFS tells
that it is going to change only some part of the page, we obviously
have to load it from the media. However, if VFS tells that it is
going to change whole page, we do not read it from the media for
optimization purposes.
However, since we do not read it, we do not know if it exists on
the media or not (a hole, etc). So we set the 'PG_checked' flag
to this page to force bigger budget, just in case.
So 'ubifs_write_begin()' sets 'PG_checked'. Then we are in
'ubifs_write_end()'. And VFS tells us: "hey, for some reasons I
changed my mind and did not change whole page". Frankly, I do not
know why this happens, but I hit this somehow on an ARM platform.
And this is extremely rare.
So in this case UBIFS does the following:
1. Cancels allocated budget.
2. Loads the page from the media by calling 'do_readpage()'.
3. Asks VFS to repeat the whole write operation from the very
beginning (call '->write_begin() again, etc).
And the assertion warning is hit at the step 2 - remember we have
the 'PG_checked' set for this page, and 'do_readpage()' does not
like this. So this patch fixes the problem by adding step 1.5 and
cleaning the 'PG_checked' before calling 'do_readpage()'.
All in all, this patch does not fix any functionality issue, but it
silences UBIFS false positive warning which may happen in very very
rare cases.
And while on it, this patch also improves a commentary which explains
the reasons of setting the 'PG_checked' flag for the page. The old
commentary was a bit difficult to understand.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2011-03-23 10:32:58 +02:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-12 10:34:51 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-05 16:17:42 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-12 10:34:51 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-12 10:34:51 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-12 10:34:51 +03:00
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2008-09-02 16:29:46 +03:00
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2008-10-24 10:52:57 -07:00
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2008-09-02 16:29:46 +03:00
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2008-09-12 10:34:51 +03:00
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2008-09-02 16:29:46 +03:00
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2008-09-05 16:17:42 +03:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-11-19 11:53:15 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-19 11:53:15 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-11-19 11:53:15 +02:00
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2008-11-18 20:20:05 +02:00
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2008-11-19 11:53:15 +02:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-11-18 20:20:05 +02:00
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2008-09-02 16:29:46 +03:00
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2008-07-14 19:08:37 +03:00
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2008-09-02 16:29:46 +03:00
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2008-07-14 19:08:37 +03:00
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2009-03-20 19:11:12 +02:00
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2008-07-14 19:08:37 +03:00
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2011-03-25 15:27:40 +02:00
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2008-07-14 19:08:37 +03:00
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2010-06-04 11:30:04 +02:00
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2010-05-27 01:05:34 +10:00
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2008-07-14 19:08:37 +03:00
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2010-03-05 09:21:37 +01:00
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2008-07-14 19:08:37 +03:00
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2011-11-25 23:14:36 +08:00
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2008-07-14 19:08:37 +03:00
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2011-11-25 23:14:36 +08:00
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2008-07-14 19:08:37 +03:00
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2010-03-05 09:21:37 +01:00
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2008-07-14 19:08:37 +03:00
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2008-08-20 17:16:34 +03:00
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2008-07-14 19:08:37 +03:00
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2008-08-20 17:16:34 +03:00
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2008-07-14 19:08:37 +03:00
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2010-06-04 11:30:04 +02:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2009-09-01 17:06:43 +03:00
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2008-07-14 19:08:37 +03:00
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2008-08-20 17:16:34 +03:00
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2011-03-29 18:04:05 +03:00
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2008-08-20 17:16:34 +03:00
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2008-07-14 19:08:37 +03:00
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2008-07-24 14:52:45 +03:00
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2008-07-14 19:08:37 +03:00
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2010-06-04 11:30:04 +02:00
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2008-07-14 19:08:37 +03:00
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2010-06-04 11:30:04 +02:00
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2008-07-14 19:08:37 +03:00
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2010-03-05 09:21:37 +01:00
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2008-07-14 19:08:37 +03:00
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2008-07-18 18:54:29 +03:00
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2008-07-14 19:08:37 +03:00
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2011-05-31 18:14:38 +03:00
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2008-07-14 19:08:37 +03:00
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2011-07-16 20:44:56 -04:00
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2008-07-14 19:08:37 +03:00
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2010-05-26 17:53:25 +02:00
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2008-07-14 19:08:37 +03:00
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2011-04-21 15:11:33 +03:00
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2011-04-13 10:31:52 +03:00
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2011-07-16 20:44:56 -04:00
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2008-07-14 19:08:37 +03:00
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2010-03-05 09:21:37 +01:00
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2008-07-14 19:08:37 +03:00
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2011-07-16 20:44:56 -04:00
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2008-07-14 19:08:37 +03:00
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2011-07-16 20:44:56 -04:00
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2008-07-14 19:08:37 +03:00
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2008-07-24 14:52:45 +03:00
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2008-07-14 19:08:37 +03:00
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2009-09-30 22:17:16 +02:00
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2008-07-14 19:08:37 +03:00
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2011-03-25 15:27:40 +02:00
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2008-07-14 19:08:37 +03:00
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2011-03-25 15:27:40 +02:00
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2008-07-14 19:08:37 +03:00
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2009-03-31 15:23:21 -07:00
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2013-01-23 17:07:38 -05:00
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2008-07-14 19:08:37 +03:00
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2010-09-19 18:34:26 +03:00
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2008-07-14 19:08:37 +03:00
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|
UBIFS: introduce new flag for RO due to errors
The R/O state may have various reasons:
1. The UBI volume is R/O
2. The FS is mounted R/O
3. The FS switched to R/O mode because of an error
However, in UBIFS we have only one variable which represents cases
1 and 3 - 'c->ro_media'. Indeed, we set this to 1 if we switch to
R/O mode due to an error, and then we test it in many places to
make sure that we stop writing as soon as the error happens.
But this is very unclean. One consequence of this, for example, is
that in 'ubifs_remount_fs()' we use 'c->ro_media' to check whether
we are in R/O mode because on an error, and we print a message
in this case. However, if we are in R/O mode because the media
is R/O, our message is bogus.
This patch introduces new flag - 'c->ro_error' which is set when
we switch to R/O mode because of an error. It also changes all
"if (c->ro_media)" checks to "if (c->ro_error)" checks, because
this is what the checks actually mean. We do not need to check
for 'c->ro_media' because if the UBI volume is in R/O mode, we
do not allow R/W mounting, and now writes can happen. This is
guaranteed by VFS. But it is good to double-check this, so this
patch also adds many "ubifs_assert(!c->ro_media)" checks.
In the 'ubifs_remount_fs()' function this patch makes a bit more
changes - it fixes the error messages as well.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2010-09-17 16:44:28 +03:00
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2009-03-31 15:23:21 -07:00
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2008-07-14 19:08:37 +03:00
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2012-08-27 13:34:09 +03:00
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2009-03-31 15:23:21 -07:00
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2008-07-14 19:08:37 +03:00
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2013-02-21 16:42:59 -08:00
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2008-07-14 19:08:37 +03:00
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2009-03-31 15:23:21 -07:00
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2008-07-14 19:08:37 +03:00
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2009-09-27 22:29:37 +04:00
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2008-07-14 19:08:37 +03:00
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2012-10-08 16:28:46 -07:00
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2008-07-14 19:08:37 +03:00
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2009-01-15 17:43:23 +02:00
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2008-07-14 19:08:37 +03:00
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2009-01-15 17:43:23 +02:00
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2008-07-14 19:08:37 +03:00
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2009-01-15 17:43:23 +02:00
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2008-07-14 19:08:37 +03:00
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2009-01-15 17:43:23 +02:00
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2008-07-14 19:08:37 +03:00
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2008-07-28 16:28:49 +02:00
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2008-07-14 19:08:37 +03:00
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